<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        table {
            width: 720px;
            line-height: 50px;

        }

        table,td,th {
            border: 1px solid#333;

        }

        table {
            border-collapse: collapse;
            text-align: center;

        }

        th {
            background-color: #FF8201;
        }

        tr>td:first-child {
            width: 100px;
            font-weight: bold;

        }
    </style>
</head>

<body>
    <table>
        <thead>
            <tr>
                <th colspan="2">
                    商城
                </th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td font-weight="bolder">手机</td>
                <td>电脑</td>
            </tr>
            <tr>
                <td>手机</td>
                <td>电脑</td>
            </tr>
            <tr>
                <td>手机</td>
                <td>电脑</td>
            </tr>
        </tbody>

    </table>
</body>

</html>